Two-Dimensional Conjugated Aromatic Networks as High-Site-Density and Single-Atom Electrocatalysts for the Oxygen Reduction Reaction

Shaoxuan Yang; Yihuan Yu; Meiling Dou; Zhengping Zhang; Liming Dai; Feng Wang

doi:10.1002/anie.201908023

Two-Dimensional Conjugated Aromatic Networks as High-Site-Density and Single-Atom Electrocatalysts for the Oxygen Reduction Reaction

Angew Chem Int Ed Engl. 2019 Oct 7;58(41):14724-14730. doi: 10.1002/anie.201908023. Epub 2019 Sep 18.

Authors

Shaoxuan Yang^{1

2}, Yihuan Yu^{1

2}, Meiling Dou^{1

2}, Zhengping Zhang^{1

2}, Liming Dai³, Feng Wang^{1

2}

Affiliations

¹ State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
² Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
³ Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA.

PMID: 31418496
DOI: 10.1002/anie.201908023

Abstract

Two-dimensional conjugated aromatic networks (CAN) with ultra-thin conjugated layers (ca. 3.5 nm) and high single-metal-atom-site density (mass content of 10.7 wt %, and 0.73 metal atoms per nm² ) are prepared via a facile pyrolysis-free route involving a one-step ball milling of the solid-phase-synthesized polyphthalocyanine. These materials display outstanding oxygen reduction reaction (ORR) mass activity of 47 mA mg_cat. ^-1 represents 1.3- and 6.4-fold enhancements compared to Pt and Pt/C in benchmark Pt/C, respectively. Moreover, the primary Zn-air batteries constructed with CAN as an air electrode demonstrate a mass/volume power density of 880 W g_cat. ^-1 /615 W cm_cat. ^-3 and stable long-term operation for 100 h. This strategy offers a new way to design high-performance electrocatalysts with atomic precision for use in other energy-storage and conversion applications.

Keywords: Zn-air battery; conjugated aromatic networks; high active site density; oxygen reduction reaction; single atoms.

Publication types

Review

Abstract

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